Home / 122,979.40-184,469.10-78,656.20

Finding the Fourth Proportional to 122,979.40, 184,469.10 and 78,656.20

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Solution

The fourth proportional to 122,979.40, 184,469.10 and 78,656.20 is: 117,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,979.40 : 184,469.10 = 78,656.20 : x
  2. Step 2: Convert to fraction form
    122,979.40/184,469.10 = 78,656.20/x
  3. Step 3: Cross multiply
    122,979.40x = 184,469.10 × 78,656.20
  4. Step 4: Simplify right side
    122,979.40x = 14,509,638,423.42
  5. Step 5: Solve for x
    x = 14,509,638,423.42/122,979.40
  6. Step 6: Final answer
    x = 117,984.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.